Unique tree names include alder, buckeye, catalpa, dogwood and honey-locust. Additional trees that have unique names are chinkapin, hemlock, larch, tanoak and yew, all of which are common trees that are found in the Pacific Northwest. Other unique tree names include cottonwood, elm, filbert and Sequoia.
The two species of catalpa are native to Midwestern and Southeastern United States. Catalpas flower in trumpet-shaped, upright, white clusters.
The larch tree has needles that turn a bright yellow every year before they shed. Yews are slow-growing trees that have green needles and a red fleshy fruit with a seed inside. These seeds are poisonous.